11 1/2”’ | Automatic | Swiss Lever | Sweeping Seconds | Date | Day |

Remarks:

• Automatic with bi-directional winding, hand winding possible
• Quick-setting for date and day
• Hacking seconds
• Seiko Diafix combined settings for escape wheel and fourth wheel
• Movement family:
  • Seiko 5206A: date, day, 23 jewels
  • Seiko 5216A: date, day, 25 jewels
  • Seiko 5245A: date, 25 jewels
  • Seiko 5246A: date, day, 25 jewels, differences not known
  • Seiko 5256A: date, day, 25 jewels, differences not known

• Listing ID: 17422
• Manufacturer / Brand: Seiko
• Caliber: 5246A
• Size in French Lignes: 11 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date & Day
• Jewels: 25
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Seiko Diashock
• Beats per hour: 28,800
• Balance Type: Glucydur
• Power Reserve: Unknown
• Production Period: 1972 - 1973
• Country: Japan
• Identification: Movement marked with SEIKO 5246A. Original datasheet available.
• Contributor ©: Uhrforum.de member buchenhain
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-75#post-10399933